EP 4163726 A1 20230412 - TRANSFER DEVICE AND IMAGE FORMING APPARATUS

Title (en)

TRANSFER DEVICE AND IMAGE FORMING APPARATUS

Title (de)

ÜBERTRAGUNGSVORRICHTUNG UND BILDERZEUGUNGSVORRICHTUNG

Title (fr)

DISPOSITIF DE TRANSFERT ET APPAREIL DE FORMATION D'IMAGES

Publication

EP 4163726 A1 20230412 (EN)

Application

EP 22199801 A 20221005

Priority

JP 2021164881 A 20211006

Abstract (en)

A transfer device (25) includes a transfer roller (15) and a transfer counter roller (16). The transfer roller (15) has an elastic layer (15a), contacts with and separates from an image bearer (7) including a belt-shaped elastic body, and nips a recording medium (S) with the image bearer (7). The transfer counter roller (16) has an elastic layer (16a), is disposed facing the transfer roller (15), and nips the image bearer with the transfer roller (15). The transfer counter roller (16) or the transfer roller (15) is applied with a bias to transfer the toner image. Each of the elastic layers (15a, 16a) of the transfer roller (15) and the transfer counter roller (16) has an Asker C hardness of 75 or less. A difference in thickness between the elastic layers (15a, 16a) of the transfer roller (15) and the transfer counter roller (16) is ± 3% or less.

IPC 8 full level

G03G 15/16 (2006.01)

CPC (source: EP US)

G03G 15/1605 (2013.01 - EP); G03G 15/162 (2013.01 - US); G03G 15/1675 (2013.01 - EP US); G03G 15/1685 (2013.01 - EP US); G03G 15/1615 (2013.01 - EP); G03G 15/162 (2013.01 - EP); G03G 2215/1623 (2013.01 - US)

Citation (applicant)

JP 5887909 B2 20160316

Citation (search report)

[XY] JP H10171262 A 19980626 - FUJI XEROX CO LTD
[Y] US 2016274503 A1 20160922 - SUGIURA KENJI [JP], et al
[A] US 2005031384 A1 20050210 - SOHMIYA NORIMASA [JP], et al
[A] JP 2010145518 A 20100701 - KONICA MINOLTA BUSINESS TECH
[A] US 2017010566 A1 20170112 - KATO TSUTOMU [JP], et al
[A] US 2012121293 A1 20120517 - MIMBU RYUUICHI [JP], et al

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

Designated validation state (EPC)

KH MA MD TN

DOCDB simple family (publication)

EP 4163726 A1 20230412; JP 2023055472 A 20230418; US 2023103454 A1 20230406

DOCDB simple family (application)

EP 22199801 A 20221005; JP 2021164881 A 20211006; US 202217823605 A 20220831